title: Spin relaxation in semiconductor quantum rings and dots--a comparative study.
abstract: We calculate spin relaxation times due to spin-orbit-mediated electron-phonon interactions for experimentally accessible semiconductor quantum ring and dot architectures. We elucidate the differences between the two systems due to different confinement. The estimated relaxation times (at B = 1 T) are in the range between a few milliseconds to a few seconds. This high stability of spin in a quantum ring allows us to test it as a spin qubit. A brief discussion of quantum state manipulations with such a qubit is presented.
authors.affiliation: Institute of Physics, University of Silesia, Katowice, Poland.
authors.forename: Elżbieta
authors.initials: E
authors.lastname: Zipper
authors.forename: Marcin
authors.initials: M
authors.lastname: Kurpas
authors.forename: Janusz
authors.initials: J
authors.lastname: Sadowski
authors.forename: Maciej M
authors.initials: MM
authors.lastname: Maśka